How to add Owner to FIM Group (Powershell)

How to add display Owner to FIM Group (Powershell) , when the requirement is to add multiple owner from a txt file, the below is sample script which can be tweak.
<#-----------------------------------------------
Author : Anirban
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If(@(Get-PSSnapin | Where-Object {$_.Name -eq "FIMAutomation"} ).count -eq 0) {Add-PSSnapin FIMAutomation}
$groupObject = Export-FIMConfig -customConfig "/Group[DisplayName = 'DisplayNameoftheGroup']" -Uri "http://localhost:5725" -OnlyBaseResources

$userObject = Export-FIMConfig -Uri http://localhost:5725 -onlyBaseResources -customConfig "/Person[DisplayName = 'DisplayNameoftheOwner']"


$importChange = New-Object Microsoft.ResourceManagement.Automation.ObjectModel.ImportChange
$importChange.Operation = 0
$importChange.AttributeName = "Owner"
$importChange.AttributeValue = $userObject.ResourceManagementObject.ObjectIdentifier
$importChange.FullyResolved = 0
$importChange.Locale = "Invariant"

$importObject = New-Object Microsoft.ResourceManagement.Automation.ObjectModel.ImportObject
$importObject.ObjectType = "Group"
$importObject.TargetObjectIdentifier = $groupObject.ResourceManagementObject.ObjectIdentifier
$importObject.SourceObjectIdentifier = $groupObject.ResourceManagementObject.ObjectIdentifier
$importObject.State = 1
$ImportObject.Changes = (,$ImportChange)

$importObject | Import-FIMConfig -Uri http://localhost:5725